Never seen this one. . .

I was hoping somebody could tell me what "REC Current Arm" means when it comes on in the viewfinder. It happened to me a couple of times today. All the warning lights would go on during record and "REC Current Arm" would flash in the bottom portion of the viewfinder. Bizarre, I had never seen it before. I looked at the footage and it recording all fine. It would flash for a bit then stop and then happen again some time later. It was doing this all day long. Any idea? Anyone seen this before? Let me know. I own a brand new F900R.